Dell Latitude 5520 archive for an 11th Gen Intel version, with the reference 19819-1, which matches the style of a Dell board number but is not confirmed. At 22.2 MB the RAR may contain schematic and boardview files, though the name does not say. Compare the number with the label on your motherboard before use. Such data helps to trace power rails, find test points and isolate shorts on the board.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ShareMan_Electronic_Files. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)